Malicious PDF — malware analysis report

Static analysis result for SHA-256 0454f14abf342a9f…

MALICIOUS

PDF

84.9 KB Created: 2021-03-06 23:48:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 058a80e4beae006f7bc01db89f1eb5df SHA-1: 16d1722f9776df27ce02784b5f2f0e5345e513f6 SHA-256: 0454f14abf342a9fc4c29173b20dc8e175ca87af9c51601b8352235fedddd778
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a significant number of external links, flagged as a 'PDF_SEO_LINK_FARM', suggesting a malicious intent to redirect users. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were directly extracted, the presence of embedded URLs and the overall structure indicate a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://resalured.ru/123?utm_term=enfermedades+sistema+endocrino+comunes
    • http://xiwakaravivomik.scienceontheweb.net/a_streetcar_named_desire_stella_and_blanche_relationship.pdf
    • https://cdn.sqhk.co/dodazija/ifhijfm/8203499417.pdf
    • https://cdn.sqhk.co/jifigetuxu/hhTAib9/jaxusefagosesuzib.pdf
    • https://cdn.sqhk.co/lisakopew/jbSbjex/splash_lagoon_nearby_hotels.pdf
    • http://zijozarub.mygamesonline.org/lezuvamezibujigenemofu.pdf
    • https://cdn.sqhk.co/logubaxe/hc5TyLz/this_is_the_police_hit_and_run_frames.pdf
    • https://cdn.sqhk.co/kidurukazag/auw8ES9/wakarixibonegolemekoz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://f26e6bca-ce10-4524-9610-ed5ef7c8d48b.filesusr.com/ugd/ac8c68_04cd95a195f34c77b830d0f37c514af5.pdf?index=true
    • https://uploads.strikinglycdn.com/files/63e8f7a3-b367-4697-a145-23ab864a5566/lumion_for_sketchup_2016_free_download_64_bit.pdf
    • https://uploads.strikinglycdn.com/files/50331959-49bd-402f-a8b1-4fa4030e6f35/live_forever_tab.pdf
    • https://9e1b5e4e-b4ab-405b-8fdf-b3b6d7b19c28.filesusr.com/ugd/94ea38_969c0ef8ff5b487e8c60d220e8bc3a70.pdf?index=true
    • https://uploads.strikinglycdn.com/files/4758ee77-4cd7-48b3-b2f7-276a80e01a6b/nessun_dorma_lyrics_in_spanish.pdf
    • https://uploads.strikinglycdn.com/files/bbabce6d-eb89-4627-85e5-bd4a3d284542/dutejizidekefuxalitij.pdf
    • https://uploads.strikinglycdn.com/files/92ff0c82-2a42-415b-a5be-20e56a5d2dd9/ideal_team_player_synopsis.pdf
    • https://uploads.strikinglycdn.com/files/b45d13fb-b765-4685-b435-53dca5b48ced/how_do_you_become_a_kid_spy.pdf
    • https://97a45c9e-1ab5-462a-bfe2-fded34b9a8b9.filesusr.com/ugd/b50c55_43281d9c8ca74630afba180a66feeed0.pdf?index=true
    • https://uploads.strikinglycdn.com/files/12b580c8-b8e4-4b1f-9076-d20464ac3c71/caracteristicas_principales_del_modo_de_produccion_de_la_comunidad_primitiva_esclavista.pdf
    • https://ce2645ba-e89a-43d5-afff-5c0150757291.filesusr.com/ugd/c63dba_658c0b1f5b594e83bf2a133c05cabc5d.pdf?index=true
    • https://uploads.strikinglycdn.com/files/f5ef1f5a-f674-4716-9062-babdfa4bd07c/sea_monster_names_greek.pdf
    • https://336ddc11-c37d-4cd6-9685-7accad2975f7.filesusr.com/ugd/479fa9_e562969116e14963951ce82bef8b9cae.pdf?index=true
    • https://uploads.strikinglycdn.com/files/7707146c-4763-4668-bd24-bfb5e2505a6b/65944090629.pdf
    • https://uploads.strikinglycdn.com/files/7e9912b5-830c-4f7e-99f8-f65c6e3dfb84/how_to_unlock_ipod_nano_1st_generation.pdf
    • https://uploads.strikinglycdn.com/files/600cd49d-1943-47f6-8890-cc61459058dd/notas_de_para_elisa_piano_do-re-mi.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7d5.bin
b6cde8bd4adaa4e182a76762cc8e965e7a5cc2d5b149b337ac3f83fe7647a4d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D5 5092 bytes
font_01_sfnt_off0001090f.bin
0a7685c3c503de2684ac623805c73eae9a85d0e66734d7d20a56df697b196d2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1090F 11624 bytes
font_02_sfnt_off00012f00.bin
ff25e7f6a43f1b59442a35e56bc56f3cfd2cff6193593d34390440b8d778df35		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12F00 16076 bytes

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